TREATMENT DEVICE WITH DAMPING FEATURE
Treatment device for ultrasonic treatment and high frequency treatment procedure is equipped with an ultrasonic transducer including piezoelectric elements converting electrical power into ultrasonic vibrations. The treatment device includes a transmission rod with a treatment probe and jaw for clasping objects. The transmission rod includes features for damping, such as a sheath, a geometry of the outer surface of the transmission rod, or combinations of such features, to minimize or prevent excess vibrations and to, among other things, decrease frictional heat caused by the friction between the damping features and the transmission rod arising from attenuating the ultrasonic vibrations.
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This application is based on and claims priority under 35 U.S.C. § 119 to U.S. Provisional Application No. 63/152,888 filed on Feb. 24, 2021, the entire contents of which are incorporated herein by reference.
FIELD OF DISCLOSUREThe present invention relates to an ultrasonic treatment device used for dissecting and coagulating tissues. The ultrasonic treatment device is equipped with an ultrasonic transducer including piezoelectric elements converting electrical power into ultrasonic vibrations. The ultrasonic vibrations are transmitted along the transmission member to a probe that serves to clasp objects together with a jaw. The transmission member may create undesired transverse vibration that causes problems such as deterioration of blood vessel sealing performance, heat generation, abnormal stress, and abnormal noise.
BACKGROUNDIn the discussion that follows, reference is made to certain structures and/or methods. However, the following references should not be construed as an admission that these structures and/or methods constitute prior art. Applicant expressly reserves the right to demonstrate that such structures and/or methods do not qualify as prior art against the present invention.
The damping sheath 160 is constructed of a polymeric material, preferably with a low coefficient of friction to minimize dissipation of energy from the axial motion or longitudinal vibration of the transmission rod 86. The damping sheath 160 is preferably in light contact with the transmission rod 86 to dampen or limit non-axial or transverse side-to-side vibration of the transmission rod 86. The damping sheath 160 can dampen transverse motion occurring near multiple nodes and antinodes of the unwanted vibration which are located randomly along the length of the transmission rod 86 relative to the nodes and antinodes of the desired longitudinal vibration.
Transverse vibrations occurring in ultrasonic treatment devices when the ultrasonic probe is vibrated can lead to problems, such as deterioration of blood vessel sealing performance, heat generation, abnormal stress, and abnormal noise. Even though previous ultrasonic treatment devices may have structures, such as the damping sheath 160, such a damping sheath 160 is in contact throughout the transmission rod 86 in areas where dampening or limiting the non-axial or transverse side-to-side vibration is not necessary. Additionally, this configuration may cause problems such as heat generation through friction between the transmission rod 86 and the damping sheath 160 due to longitudinal vibration.
SUMMARYAccordingly, there is a need for designing an ultrasonic treatment device with an efficient structure in view of the practical usage, which would substantially obviate one or more of the issues due to limitations and disadvantages of related art treatment devices. An object of the present disclosure is to provide an improved treatment device having an efficient structure and practical administration of the associated medical procedure. For example, there is a need to provide improved damping solutions that, for example, minimize the contact between a transmission rod and a damping structure, such as a sheath, so as to minimize or prevent heat generation or other issues to arise. At least one or some of the objectives is achieved by the treatment device disclosed herein.
Additional features and advantages will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the disclosed treatment device will be realized and attained by the structure particularly pointed out in the written description and claims thereof, as well as the appended drawings.
In general, the disclosed structures and systems provide for an ultrasonic treatment device efficiently suppressing problems such as deterioration of blood vessel sealing performance, heat generation, abnormal stress, and abnormal noise created from vertical and/or horizontal ultrasonic vibrations.
Embodiments of the disclosed surgical treatment device comprises a transducer generating ultrasonic vibrations, a transmission rod including a treatment probe in which a proximal end of the transmission rod is operatively connected to the transducer for transmitting ultrasonic vibration generated by the transducer to the treatment probe located at the distal end, and a damping feature for attenuating vibrations movably placed along the longitudinal axis direction of the transmission rod between an adjacent node and antinode of the longitudinal vibration. The transmission rod includes a tapered portion having an outer surface that is inclined inwardly from a distal end of the tapered portion towards a proximal end of the tapered portion and the outer surface of the tapered portion has a maximum outer diameter that is larger than an inner diameter of the damping feature. Furthermore, along the transmission rod, the node of the longitudinal vibration is located more distally than the tapered portion of the transmission rod.
In some embodiments, a surgical treatment device comprises a transducer generating ultrasonic vibrations, a transmission rod including a treatment probe in which a proximal end of the transmission rod is operatively connected to the transducer for transmitting ultrasonic vibration generated by the transducer to the treatment probe located at the distal end, and a damping feature for attenuating vibrations movably placed along the longitudinal axis direction of the transmission rod between an adjacent node and antinode of the longitudinal vibration. The transmission rod includes a tapered portion having an outer surface that is inclined inwardly from the proximal end of the tapered portion towards the distal end of the tapered portion and the outer surface of the tapered portion has a maximum outer diameter that is larger than an inner diameter of the damping feature. Furthermore, along the transmission rod, the node of the longitudinal vibration is located more proximally than the tapered portion of the transmission rod.
In some embodiments, the damping feature is a tube.
In some embodiments, the damping feature is a sleeve.
In some embodiments, the damping feature includes a tapered portion.
In some embodiments, the damping feature includes a slit.
In some embodiments, a rubber ring is placed at the node.
In some embodiments, the transmission rod includes a first portion having an outer diameter larger than the inner diameter of the damping feature, wherein, along the transmission rod, the first portion is placed more proximally than the tapered portion of the transmission rod.
In some embodiments, the transmission rod includes a first portion having an outer diameter larger than the inner diameter of the damping feature, wherein, along the transmission rod, the first portion is placed more distally than the tapered portion of the transmission rod.
In some embodiments, the first portion is located proximate to the antinode of the longitudinal vibration.
In some embodiments, the first portion is removable from the transmission rod.
In some embodiments, the first portion is assembled together with the transmission rod through a screw.
In some embodiments, the first portion is assembled together with the transmission rod through shrink fitting.
In some embodiments, the treatment probe is configured to treat living tissue.
In some embodiments, the treatment probe is configured as an electrode for treatment using high frequency currents.
In some embodiments, the treatment probe includes a curved shape.
In some embodiments, a transmission rod comprises an elongate body configured for transmitting ultrasonic vibration from a proximal end to a distal end and a treatment probe formed at the distal end of the elongate body. The treatment probe includes a treatment surface and a tapered portion having an outer surface that is inclined inwardly from a distal end of the tapered portion towards a proximal end of the tapered portion, and along the transmission rod, a node of the ultrasonic vibration is located more distally than the tapered portion of the transmission rod.
In some embodiments, a transmission rod comprises an elongate body configured for transmitting ultrasonic vibration from a proximal end to a distal end and a treatment probe formed at the distal end of the elongate body, wherein the treatment probe includes a treatment surface. The transmission rod includes a tapered portion having an outer surface that is inclined inwardly from a proximal end of the tapered portion towards a distal end of the tapered portion, and along the transmission rod, a node of the ultrasonic vibration is located more proximally than the tapered portion of the transmission rod.
In some embodiments, the treatment probe includes a jaw moveable relative to the treatment surface from an open position to a closed position.
In some embodiments, a rubber ring is placed at a node of the ultrasonic vibrations.
In some embodiments, the transmission rod includes a first portion having an outer diameter larger than the other portions of the transmission rod.
In some embodiments, the first portion is placed more distally than the tapered portion of the transmission rod.
In some embodiments, the first portion is placed more proximally than the tapered portion of the transmission rod.
In some embodiments, the first portion is located at an antinode of the longitudinal vibration.
In some embodiments, the first portion is removable from the transmission rod.
In some embodiments, the first portion may be assembled together with the transmission rod with a screw.
In some embodiments, the thickened portion may be assembled together with the transmission rod with a shrink fitting.
In some embodiments, the transmission rod is configured as an electrode for treatment using high frequency currents.
In some embodiments, the treatment probe is configured to treat living tissues.
In some embodiments, the treatment probe is configured as an electrode for treatment using high frequency currents.
In some embodiments, the treatment probe has a curved shape.
Other systems, methods, features and advantages will be, or will become, apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the present disclosure, and be protected by the following claims. Nothing in this section should be taken as a limitation on those claims. Further aspects and advantages are discussed below in conjunction with the embodiments of the disclosed input device. It is to be understood that both the foregoing general description and the following detailed description of the disclosed input device are examples and explanatory and are intended to provide further explanation of the disclosed input device as claimed.
The following detailed description of preferred embodiments can be read in connection with the accompanying drawings in which like numerals designate like elements and in which:
Throughout all of the drawings, dimensions of respective constituent elements are appropriately adjusted for clarity. For ease of viewing, in some instances only some of the named features in the figures are labeled with reference numerals.
DETAILED DESCRIPTIONConsidering the use of ultrasonic probe 404 in treatment procedures, longitudinal vibration would be the desirable ultrasonic vibration. On the contrary, transverse vibrations and torsional vibrations would be undesirable ultrasonic vibrations that may cause issues during the treatment procedures. Because the ultrasonic probe 404 is curved in the horizontal direction with an aim to improve the visibility during the treatment procedure, the axial unbalance of the ultrasonic probe 404 in the horizontal direction may create substantial transverse vibrations when the ultrasonic vibration is applied to the ultrasonic probe 404. In the case shown in
Although the structure of the attenuation tube 604 in
Step structure 702 may be made removable from transmission member 502 by, e.g., separation of portion P1 from portion P2, in order to ease the assembly of the attenuation tube 604 and transmission member 502. For example, the step structure 702 may be assembled together with the transmission member 502 through a screw or shrink fitting the large dimeter portion P1 onto smaller diameter portion P2. Since the attenuation tube 604 is slidably located between the step structure 702 and tapered portion 704 (as described above), the attenuation tube 604 has the tendency to move towards the node position of longitudinal vibration (such as at 47 kHz or 55 kHz) during oscillation of the transmission member 502, such as during operation of a treatment device incorporating the transmission member 502. Also, it is preferred to set the antinode position of the longitudinal vibration of the ultrasonic vibration near the step structure 702 and the node position of the longitudinal vibration of the ultrasonic vibration near the node structure 606, such as at rubber member shown in
The embodiments disclosed in
Although the present invention has been described in connection with preferred embodiments thereof, it will be appreciated by those skilled in the art that additions, deletions, modifications, and substitutions not specifically described may be made without department from the spirit and scope of the invention as defined in the appended claims.
Claims
1. A surgical treatment device, comprising:
- a transducer generating ultrasonic vibrations;
- a transmission rod including a treatment probe, wherein a proximal end of the transmission rod is operatively connected to the transducer for transmitting ultrasonic vibration generated by the transducer to the treatment probe located at a distal end of the transmission rod; and
- a damping feature for attenuating vibrations movably placed along the longitudinal axis direction of the transmission rod between an adjacent node and antinode of the longitudinal vibration,
- wherein the transmission rod includes a tapered portion, and
- wherein the outer surface of the tapered portion has a maximum outer diameter that is larger than an inner diameter of the damping feature.
2. The surgical treatment device according to claim 1, wherein the outer surface of the tapered portion is inclined inwardly from a distal end of the tapered portion towards a proximal end of the tapered portion, and
- wherein, along the transmission rod, the node of the longitudinal vibration is located more distally than the tapered portion of the transmission rod.
3. The surgical treatment device according to claim 1, wherein the outer surface of the tapered portion is inclined inwardly from a distal end of the tapered portion towards a proximal end of the tapered portion, and
- wherein, along the transmission rod, the node of the longitudinal vibration is located more proximally than the tapered portion of the transmission rod.
4. The surgical treatment device according to claim 1, wherein the damping feature is a tube.
5. The surgical treatment device according to claim 1, wherein the damping feature is a sleeve.
6. The surgical treatment device according to claim 1, wherein the damping feature includes a tapered portion.
7. The surgical treatment device according to claim 1, wherein the damping feature includes a slit.
8. The surgical treatment device according to claim 1, wherein a rubber ring is placed at the node.
9. The surgical treatment device according to claim 1, wherein the transmission rod includes a first portion having an outer diameter larger than the inner diameter of the damping feature, and
- wherein, along the transmission rod, the first portion is placed more proximally than the tapered portion of the transmission rod.
10. The surgical treatment device according to claim 9, wherein the first portion is located proximate to the antinode of the longitudinal vibration.
11. The surgical treatment device according to claim 9, wherein the first portion is removable from the transmission rod.
12. The surgical treatment device according to claim 9, wherein the first portion is assembled together with the transmission rod through a screw.
13. The surgical treatment device according to claim 9, wherein the first portion is assembled together with the transmission rod through shrink fitting.
14. The surgical treatment device according to claim 1, wherein the treatment probe is configured to treat living tissue.
15. The surgical treatment device according to claim 1, wherein the treatment probe is configured as an electrode for treatment using high frequency currents.
16. The surgical treatment device according to claim 1, wherein the treatment probe includes a curved shape.
17. The surgical treatment device according to claim 1, wherein the treatment probe includes one or more jaws.
18. A transmission rod, comprising:
- an elongate body configured for transmitting ultrasonic vibration from a proximal end to a distal end; and
- a treatment probe formed at the distal end of the elongate body, wherein the treatment probe includes a treatment surface,
- wherein the transmission rod includes a tapered portion having an outer surface that is inclined inwardly from a distal end of the tapered portion towards a proximal end of the tapered portion,
19. The transmission rod according to claim 18, wherein the transmission rod includes a first portion having an outer diameter larger than the other portions of the transmission rod.
20. The transmission rod according to claim 19, wherein the first portion is removable from the transmission rod.
Type: Application
Filed: Feb 9, 2022
Publication Date: Aug 25, 2022
Applicant: OLYMPUS MEDICAL SYSTEMS CORP. (Tokyo)
Inventors: Hiroshi ASHIBA (Tokorozawa-shi), Yasuhiro MAEDA (Tokyo), Minoru KATSUMATA (Tokyo)
Application Number: 17/667,592